Answer:
Option B, Farmers who grow GM crops have much higher yields that farmers growing unmodified crops.
Step-by-step explanation:
An arguments in support of GM crops must show the positive effect of the genetic modification for any of the parameter involved in crop production such as yield, dependency on artificial fertilizer, attack of insecticide or pesticide, genetic diversity , etc. Here all except option B are outlining the negativities associated with GM crops.
Genetically modified crops are less resistant to diseases and also the hybrid seeds have high productivity rate due to which the annual yield escalates.
Hence, option B